APPARATUS AND METHOD FOR ESTIMATING AN INTER-CHANNEL TIME DIFFERENCE

    公开(公告)号:EP3405949A1

    公开(公告)日:2018-11-28

    申请号:EP17700707.7

    申请日:2017-01-20

    IPC分类号: G10L19/008 G10L19/02

    摘要: An apparatus for encoding a multi-channel signal comprising at least two channels, comprises: a time-spectral converter (1000) for converting sequences of blocks of sample values of the at least two channels into a frequency domain representation having sequences of blocks of spectral values for the at least two channels, wherein a block of sampling values has an associated input sampling rate, and a block of spectral values of the sequences of blocks of spectral values has spectral values up to a maximum input frequency (1211) being related to the input sampling rate; a multi-channel processor (1010) for applying a joint multi-channel processing to the sequences of blocks of spectral values or to resampled sequences of blocks of spectral values to obtain at least one result sequence of blocks of spectral values comprising information related to the at least two channels; a spectral domain resampler (1020) for resampling the blocks of the result sequences in the frequency domain or for resampling the sequences of blocks of spectral values for the at least two channels in the frequency domain to obtain a resampled sequence of blocks of spectral values, wherein a block of the resampled sequence of blocks of spectral values has spectral values up to a maximum output frequency (1231, 1221) being different from the maximum input frequency (1211); a spectral-time converter for converting the resampled sequence of blocks of spectral values into a time domain representation or for converting the result sequence of blocks of spectral values into a time domain representation comprising an output sequence of blocks of sampling values having associated an output sampling rate being different from the input sampling rate; and a core encoder (1040) for encoding the output sequence of blocks of sampling values to obtain an encoded multi-channel signal (1510).

    DOWNSCALED DECODING
    8.
    发明公开
    DOWNSCALED DECODING 审中-公开
    VERKLEINERTE DECODIERUNG

    公开(公告)号:EP3107096A1

    公开(公告)日:2016-12-21

    申请号:EP15189398.9

    申请日:2015-10-12

    IPC分类号: G10L19/02 G10L19/022

    CPC分类号: G10L19/0212 G10L19/022

    摘要: A downscaled version of an audio decoding procedure may more effectively and/or at improved compliance maintenance be achieved if the synthesis window used for downscaled audio decoding is a downsampled version of a reference synthesis window involved in the non-downscaled audio decoding procedure by downsampling by the downsampling factor by which the downsampled sampling rate and the original sampling rate deviate, and downsampled using a segmental interpolation in segments of 1/4 of the frame length.

    摘要翻译: 如果用于缩小音频解码的合成窗口是非缩减音频解码过程中涉及的参考合成窗口的下采样版本,则可以更有效地和/或改进符合性维护,缩减版本的音频解码过程可以通过下采样 下采样因子通过下采样采样率和原始采样率偏离,并使用帧长度的1/4的段中的段插值下采样。